Who thought "easy to use" rhymed with "make the icons look like nearly identical and somewhat indistinguishable blue squares"? Who decided that an already rather unprofessional drawing of Tux needed to be transformed into Baby's First Vector Drawing™?
And why, when previous versions already did a semi-respectable job of at least _pretending_ to look like a native Cocoa app on macOS, does version 6 not only regress its implementation of the Aqua theme down to everything-is-grey but do so by getting rid of the gradient that emulated NSToolbar on most settings windows whilst then _adding_ ugly gradients to the list of VM settings on the main window in place of the vastly more functional rounded rectangles with separate headers of previous versions?
You see, if it's possible to regress the user interface so badly _when it was already fine_, I don't hold much hope for the rest of the technology. Call me a snob, but it reeks of sloppiness.